7x-9=91-3x

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Solution for 7x-9=91-3x equation:


Simplifying
7x + -9 = 91 + -3x

Reorder the terms:
-9 + 7x = 91 + -3x

Solving
-9 + 7x = 91 + -3x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '3x' to each side of the equation.
-9 + 7x + 3x = 91 + -3x + 3x

Combine like terms: 7x + 3x = 10x
-9 + 10x = 91 + -3x + 3x

Combine like terms: -3x + 3x = 0
-9 + 10x = 91 + 0
-9 + 10x = 91

Add '9' to each side of the equation.
-9 + 9 + 10x = 91 + 9

Combine like terms: -9 + 9 = 0
0 + 10x = 91 + 9
10x = 91 + 9

Combine like terms: 91 + 9 = 100
10x = 100

Divide each side by '10'.
x = 10

Simplifying
x = 10

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